Display device and driving method thereof

Abstract

A display device includes a display panel including a pixel arranged thereon, a data driver configured to modulate video data to supply a data voltage to the pixel through a data line, a switching component configured to be turned on in response to a parking voltage enable signal to supply a parking voltage to the pixel, and a timing controller configured to control the data driver and the switching component to apply the data voltage to the pixel during a refresh period of a frame and the parking voltage to the pixel during one or more hold periods following the refresh period, wherein the timing controller adjusts a parking period for applying the parking voltage based on the luminance of the video data.

What is claimed is: 
     
       1. A display device comprising:
 a display panel comprising a pixel arranged thereon; 
 a data driver integrated circuit configured to modulate video data and to supply a data voltage to the pixel through a data line; 
 a switch configured to be turned on in response to a parking voltage enable signal and to supply a parking voltage to the data line; and 
 a timing controller configured to control the data driver integrated circuit and the switching component to apply the data voltage to the pixel during a refresh period of a frame and the parking voltage to the data line during a hold period following the refresh period, 
 wherein the timing controller adjusts a parking interval for applying the parking voltage based on luminance of the video data, and 
 wherein the timing controller outputs the parking voltage enable signal at every i hold periods for an image with a first luminance and at every j hold periods for an image with a second luminance higher than the first luminance, where, i is a natural number greater than 1, and j is a natural number less than i. 
 
     
     
       2. The display device of  claim 1 , wherein the parking interval includes one or more hold periods and is elongated as the luminance increases. 
     
     
       3. The display device of  claim 2 , wherein the timing controller loads a predetermined parking interval defining an application interval of the parking voltage corresponding to the luminance. 
     
     
       4. The display device of  claim 2 , wherein the timing controller controls an interval of applying the parking voltage to the data line differently depending on the luminance while maintaining the same driving frequency conditions. 
     
     
       5. The display device of  claim 1 , wherein the timing controller transmits the video data to the data driver during the refresh period and suspends transmitting the video data during the hold period. 
     
     
       6. The display device of  claim 2 , wherein the one or more hold periods each comprise an anode reset period for initializing an anode electrode of a light emitting element of the pixel to a predetermined voltage, and the parking voltage is applied to the pixel through the data line during the anode reset period. 
     
     
       7. The display device of  claim 1 , wherein the hold periods in the frame are determined differently in number based on a refresh rate. 
     
     
       8. The display device of  claim 1 , wherein the refresh period is a period during which the data voltage is programmed to the pixel, and the hold period is a period during which the data voltage programing to the pixel is omitted. 
     
     
       9. A driving method of a display device, the method comprising:
 modulating video data to apply a data voltage to a pixel through a data line during a refresh period of a frame; 
 determining a parking interval for supplying a parking voltage through the data line during the frame based on a luminance of the frame; and 
 applying the parking voltage to the data line according to the parking interval in one or more hold periods following the refresh period of the frame, 
 wherein the determining the parking interval comprises: 
 determining the parking interval as i hold periods for an image with a first luminance and j hold periods for an image with a second luminance higher than the first luminance, where, i is a natural number greater than 1, and j is a natural number less than i. 
 
     
     
       10. The method of  claim 9 , wherein the perking interval comprises one or more hold periods and is elongated as the luminance increases. 
     
     
       11. The method of  claim 9 , wherein the determining of the parking interval comprises:
 determining the luminance of the video data; and 
 loading a predetermined parking interval corresponding to the determined luminance. 
 
     
     
       12. The method of  claim 9 , wherein transmitting, before the applying the data voltage, the video data to a data driver during the refresh period. 
     
     
       13. The method of  claim 12 , further comprising suspending the transmission of the video data during the hold period. 
     
     
       14. The method of  claim 9 , wherein the one or hold periods each comprise an anode reset period for initializing an anode electrode of a light emitting element of the pixel to a predetermined voltage, and the parking voltage is applied to the pixel through the data line during the anode reset period. 
     
     
       15. A display device comprising:
 a display panel comprising a pixel displaying images including low-luminance images and high-luminance images; 
 a data driver integrated circuit modulating video data and supplying a data voltage to the pixel through a data line; 
 a switch turning on in response to a parking voltage enable signal and supplying a parking voltage to the data line; and 
 a timing controller configured to control the data driver integrated circuit and the switch and apply the data voltage to the pixel during a refresh period of a frame and the parking voltage to the data line during a hold period following the refresh period, 
 wherein the timing controller shortens a parking interval to apply the parking voltage on the low-luminance images and lengthens the parking interval to apply the parking voltage on the high-luminance images, and 
 wherein the timing controller outputs the parking voltage enable signal at every i hold periods for an image with a first luminance and at every j hold periods for an image with a second luminance higher than the first luminance, where, i is a natural number greater than 1, and j is a natural number less than i. 
 
     
     
       16. The display device of  claim 15 , wherein the parking interval includes a frequency of applying the parking voltage. 
     
     
       17. The display device of  claim 15 , wherein the parking interval includes one or more hold periods and is lengthened as luminance of the images increases. 
     
     
       18. The display device of  claim 15 , wherein the timing controller transmits the video data to the data driver during the refresh period and suspends transmitting the video data during the hold period. 
     
     
       19. The display device of  claim 17 , wherein each of the one or more hold periods includes an anode reset period for initializing an anode electrode of an emissive component of the pixel to a predetermined voltage, and
 wherein the parking voltage is applied to the pixel through the data line during the anode reset period.